THE CELL
CELL COMMUNICATION
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When does DNA replication occur?
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S phase of the cell cycle
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during mitosis but not meiosis
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in animal cells but not plant cells
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as the nuclear envelope breaks down early in mitosis
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Explanation:
Detailed explanation-1: -In the eukaryotic cell cycle, chromosome duplication occurs during “S phase” (the phase of DNA synthesis) and chromosome segregation occurs during “M phase” (the mitosis phase).
Detailed explanation-2: -S phase is the period during which DNA replication occurs.
Detailed explanation-3: -Initiation and completion of DNA replication defines the beginning and ending of S phase of the cell cycle. Successful progression through S phase requires that replication be properly regulated and monitored to ensure that the entire genome is duplicated exactly once, without errors, in a timely fashion.
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